Hoisting-bucket.



HOISTING BUCKET. I APPLIoATIoN FILED JULYzv, V1906.

4 SHEETS-SHEET 1.

Ivwena'r WE'. 7777295" this Manns PE ca., wAsNmaroN. m c.

No. 838,352. l MTBNTB'D DEC. 11, v1906.

' A. E.No11111s.

HOISTING BUCKET. APPLIATIoN FILED 111111121, 1906.

4 SHEETS-SHEET 2.

PATBNTED DBG. 11, 1906.

A. B. Norms. HOISTING BUCKET.

APPLIOATION FILED JULYQ'L 1906.

4 SHEETS-SHEET 3.

N.83a,s52. I l .PATENT-11D 11110.11, 1906. 1.B.No11111s.

HOISTING BUCKET.

APPLIGATION FILED mm2?. 190e.

. 4 sums-SHEET 4.

lllllllllllllll Il [l .1| II 'T 11111111 Ira/ew?? ALMON E. NORRIS, OF CAMBRIDGE, MASSACHUSETTS.

HOlSTlNG-BUCKET.

Specicaton of Letters Patent.

Patented Dec. 11, 1906.

Application filed July 27, 1906. Serial No. 328.018.

To @ZZ whom, it 71u03/ 0072/087171,.-

Be it known that I, ALuoN E. NoRRIs, a citizen of the United States, and a resident of Cambridge, in the county of Middlesex and State of Massachusetts, have invented an Improvement in IIoisting-Buckets, of which the following description, in connection with the accompanying drawings, is a specification, like numerals on the drawings representing like parts.

This invention relates to hoisting-buckets of the clam-shell variety in which the opening and closing rope is secured to a differential drum carried by the bucket and the bucket is closed by the cooperation of this opening and closing rope with the windingrope, also Wound about said diiferential drum.

The object of the invention is to improve generally this type of bucket in the particulars hereinafter described, and more fully pointed out in the claims.

In the drawings, Figure l is a side view of my improved bucket, showing the bucket closed. Fig. 2 is a rear view thereof. Fig. 3 is a side view showing the bucket open. Fig. 4 is a section through the differential drum. Fig. 5 is a section through said drum taken at right angles to Fig. 4. Fig. 6 is a top plan view of the bucket. Fig. 7 is a top plan view of the head-block. Fig. 8 is a side view thereof. Fig. 9 is a section on the line :c Fig. 4.

The bucket comprises the two bucket-segments-3 and 4, which are shown as having the arms or ears 5 extending therefrom and connected by the pivotal rod 6. Each ofthe segments has pivotally connected to its rear end suitable links 7, which are pivoted together at their upper ends to the head-block 8 by means of a suitable pivotal pin 9. Journaled on the pivotal rod 6 is a differential drum having three drum portions of diiferent diameter, said differential drum having the drum portion 10 of larger diameter and the drum members 1l and 12 of smaller diameter, the drum member 12 being smaller than the drum member 11.

13 designates the opening and closing rope, and it has one end secured to the drum member 10, the other end of said rope extending to the hoisting-engine and being operated by one of the drums thereof, as usual.

14 designates a rope which I will term a "winding-rope. It has one end connected to the drum member 1-1 and the other end connected to the drum member 12, and it passes over a suitable guide-pulley 15, supported by the head 8, said rope being Wound in opposite directions upon the drum members 11 and 12.

16 designates the holding rope or chain which is secured to the head 8.

The parts above enumerated are those which are commonly found in a diiierential bucket of this type.

My present invention relates to the special features of improvement which will be presently described.

In operating a bucket of this type, assuming that the bucket is open, as shown in Fig. 3, the winding-rope 14 will be unwound from the drum portion 11 and will be wound upon the drum portion 12 of smaller diameter. The opening and closing rope 13 will be wound upon the drum portion of larger diameter. To close the bucket, the opening and closing rope will be drawn in, and as the weight of the bucket comes onto it it will unwind from the drum portion 10 of larger diameter, thereby turning the differential drum in a direction to wind the winding-rope up upon the intermediate drum portion 11 and unwind it from the small drum portion 12. This will result in gradually drawing the diiferential drum toward the head S, thereby closing the bucket segments together, as will be obvious.

In order to attach the opening and closing rope to the differential drum, I have provided the drum portion 10 thereof with a slot 17 in its periphery, across which a pin 18 extends, said pin passing through a loop or eye 19 on the end of the opening and closing rope. This pin 18 can be inserted in the drum from the end thereof and may be readily removed for disconnecting the opening and closing rope from the drum. The ends of the winding-rope 14 are preferably secured to the differential drum, as shown in Figs. 4 and 5. Referring to these figures, it will be noted that one end of said winding-rope has thereon a loop 20, which is received in a slot 21 in the periphery of the drum portion 1'1 and which encircles a rod or pin 22, which can ,also be inserted into position from the end of the drum. The other end of said windingrope extends through an aperture 23 in the central drum portion 10 and through another aperture 24 in the end of the drum and is engaged by a suitable rope-clamp 25 on the hub of the drum exterior to the drum portion 11.

ICO

IOS

. rope passes.

With this construction both ends of the winding-rope are readily accessible and may be easily connected to or disconnected from the drum.

The sheave 15, over which the windingrope passes, is suspended from the head in an angular position, so as to guide the windingrope from one of the drum portions 11 and 12 to the other, according to the direction in which the drum is being rotated.

It is desirable that as the winding-rope is wound upon the drum portions 11 and 12 during the opening and closing of the bucket said rope be given the proper lead, so that the coils of the rope will not wind on top of each other. To accomplish this, I provide the differential drum with an inclined shoulder 30, against which rests the rst coil of the portion of the rope wound upon the drum portion 11, the inclination of the shoulder 30 being sufficient to give the rope the proper lead or inclination, so that the coils will not pile up on top of each other. In the same way the drum portion 12 has at its inner end the inclined shoulder 31, which eX- tends from the aperture 23 substantially around the drum and which has the proper inclination to give the irst coils of rope the proper lead to cause them to lie side by side rather than to pile up on top of each other as the rope is wound on said drum portion 12.

The head-block 8 is of novel construction, it having the hub or body portion through which the pin 9 passes, the depending stem 33 integral therewith, from which the frame 34 for the guide-pulley 15 is suspended, and also having integral therewith the ears 35, to which the holding-rope is fastened, and the bracket 36 for supporting the direction-pulley 37, over which the opening and closing This bracket 36 is made with two arms 38, between which the directionpulley 37 is secured, said arms being shown as connected together by the web or iin 39. Each arm also has projecting inwardly therefrom a guard-rib 40, said ribs overlying the anges of the pulley 37 and preventing the rope from getting drawn in between the pulley and the arms 38. The web 39 is shown as cut away slightly, as at 41, to provide ample room for the rope.

Where the bracket for supporting the direction-pulley 37 is rigid with the head-block, said pulley and its supporting-bracket will be maintained in the same position during the opening and closing of the bucket, and said direction-pulley is not thrown out of position by the spreading movement of the links 7 as the bucket opens or closes, as would be the case if said direction-pulley werel supportedn by arms integral with or extending from the links 7.

Usually the pivotal pin 6 is loosely passed through the ears or arms 5 and through the drum and is free to turn. Where this is so,

both the pin 6 and the arms 5 wear quite rapidly, because of the narrow bearing which each arm has on the pin and the great riction between the parts while the bucket is opening and closing. To avoid this wear, I have keyed the pivotal pin to the arms 5 of one bucket-segment and have provided an extended bearing-surface on said pivotal pin for the arms of other bucket-segments.

As herein shown, one of the arms 5 of the bucket-segment 4 is provided with a notch, into which fits a dutchman 50, carried by the pivotal rod 6, this construction locking said pivotal rod to said arms, so that it can have no turning movement relative thereto.

The arms of the other bucket-segment 3 are provided with the bearing-bushings 51, which are preferably of some hard composition that will resist wear. rIhese bearingbushings, as herein shown, are formed with the heads 55, which are located on the inside of the arms oil the bucket-segment 3 and they extend through and line the aperture through said arms, as clearly shown in Fig. 4. The heads 55 thereof are secured to the arms in any suitable way, as by means of rivets 56. vWith this construction the length of the bearing of each of the arms 5 that turn on the pivotal pin 6 is practically doubled, and the bearing-surface of the arm is formed with some hard material which is adapted to resist the severe wear to which the parts are subliected. Since the pivotal pin 6 has no turning movement with reference to one pair of arms, it will be obvious no wear can occur between said pins and said arm, and the interposition of the wearing-bushings between said pin and the other set of arms practically eliminates the destructive wear which normally occurs at this point.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a hoisting-bucket, a pair of pivoted bucket-segments means to open and close said segments, said means including a differential drum carried by the bucket and having two portions of different diameter, one of said portions having an inclined shoulder to give the winding-rope the proper lead, a winding-rope wound on said two portions of diiierent diameter in opposite directions, and an opening and closing rope for operating the drum.

2. In a hoisting-bucket, a pair of pivoted bucket-segments, a diiierential drum carried by said bucket-segments, and having two drum portions of diHerent diameter, a winding-rope wound on said two drum portions of different diameter in opposite directions, each of said drum portions having an inclined shoulder to give the winding-rope the proper lead and an opening and closing rope for operating the drum.

3. In a hoisting-bucket, a pair of pivoted ICO IIO

bucket-segments, a differential drum carried by said bucket, said drum having three ropereceiving portions of different diameters, the rope-receiving portion of largest diameter being situated at the central portion of the drum, an opening and closing rope wound about the central portion of largest diameter, a winding-rope having its ends adapted to wind about the two portions of smaller diameter, the portion of largest diameter being provided with a slot in its periphery to receive the looped end of the opening and closing rope, and a pin extending parallel to the axis of the drum and through said looped end.

4. In a hoisting-bucket, a pair of pivoted bucket-segments, a differential drum carried by said bucket, said drum having three ropereceiving portions of different diameters, an opening and closing rope wound about the portion of largest diameter, a winding-rope having its ends adapted to wind about the two portions of smaller diameter, the larger of said two portions being provided with a slot Ain its periphery to receive the looped end of the winding-rope, and a pin extending parallel to the axis of the drum and through said looped ends.

5. In a hoisting-bucket, a pair of pivoted bucket-segments, a differential drum carried by said bucket, said drum having three ropereceiving portions of different diameters, an opening and closing rope wound about the portion of largest diameter, a winding-rope having its ends adapted to wind about the two portions of smaller diaemter, the larger of said two portions being provided with a slot in its periphery to receive the looped end of the winding-rope, a pin extending parallel to the axis of the drum and through said looped ends, the other end of said windingrope extending through one of said two drum portions, and a rope-clamp exterior to said drum portions to engage said end of the winding-rope.

6. In a hoisting-bucket, a pair of bucketsegments, a differential drum carried by said bucket, said drum having three drum portions of different diameters, an opening and closing rope wound about the drum portion of largest diameter, and a winding-rope having its ends adapted to wind about the two drum portions of smaller diameter, one end of said winding-rope extending through one of said drum portions, and a rope-clamp exterior to said drum portion for clamping said 7. In'a hoisting-bucket, a pair of pivoted bucket-segments, a drum carried .thereby and having two drum portions, a windingrope wound about said drum portion in opposite directions, the end of the winding-rope at the inner end of one drum portion extending through the other drum portion, and a rope-clamp exterior to said other drum portion to clamp the rope.

S. In a hoisting-bucket, a pair of pivoted bucket-segments, a head, links pivotally connected to the head and to the bucket-segments, said head having integral therewith a bracket, a direction-pulley carried by said bracket, and an opening and closing rope passing over said pulley.

9. In a hoisting-bucket, a head-block having extending therefrom two arms, and a direction-pulley supported by said arms, each arm having extended inwardly therefrom a guard-rib to overlie the corresponding flange of the pulley.

10. In a hoisting-bucket, two bucket-segments each having a pair of arms extending therefrom, a pivotal pin extending through said arms and locked to the arms of one pair, and a wearing-bushing secured to each arm of the other pair and provided with an extended bearing-surface on the pin.

l1. In a hoisting-bucket, two bucket-segments each having a pair of arms extending therefrom, a pivotal pin extending through said arms, means to hold the pin from turning movement relative to one pair of arms, and a wearing-bushing secured to each of the other arms, each wearing-bushing having a head portion to overlie the side of the arm and a bushing portijn to line the aperture 'm the arm.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALMON E. NORRIS.

Witnesses:

Louis C. SMITH, BERTHA F. HEUSER. 

